Flushing- valve



M. H. FLYNN.

FLUSHING VALVE.

APPLICATION FILED nec. lx; 19mi 1,368,208. v Patented Feb. 8, 1(921.

J7 J6 l J9 J6 J3 l fa 4 /9 f nl z/ I /f ,23 l* j@ 1 /f /Z'r f f 2 u f4( 1 'il M 1 /3 /NVENTf/H M'fae/ H'lynr'z.

' l UNITED sTATss PATENT" oFFlc f MICHAEL H. FLYNN, or HARTFORD, CONNisxiTIoUT,c*AssIeNoRv Tol THE M. s. LITTLE MANUFACTURING COMPANY, 0F' HARTFORD, CONNECTICUT.

i ILUsHING-VALVE. v

ySpeccation' of Letters `llfaten'c.kk

vTo all whom t may concern: l

Be it known that I, MICHAEL FL'YIIN, a citizen of the United States, and a resident of Hartford, in the county of Hartford,

State of Connecticut, have invented certain new and useful Improvements 1n Flushing- Valves, of which the following is a-specificaf tiOn.

capable of ready adjustment,fand wherein, the length of flush is predetermined irrespective of the duration of time that the manip- In the accompanying drawing the igure is a vertical sectional view of a flushing valve constructed in accordance with the 'preferred embodiment ofthe vpresent invention. f 'f Referring to this drawing in demini@ is a valve casing having aty one side an inlet, opening12 and at its bottom anfoutlet openf ing 13. Between the inlet and outlet kopenings is a cylindrical extension 14, the upper end of which serves as aseat for themain valve 15. The upper end of the valve casi-ng y is closed by a cap 16 having a port ..17 which,

l above the main valve andthe outlet openingf13. The port 17 has a valvesea-t 19,Y

located on the bottom of` the' cap 16 and against which seats a control valve'21 carrled by'a reciprocating stem 22 extending through 16. For the purpose of varying the the cap length of flush,-this valve 211 is adjustable f on the stem, in the present instanceit being in the form of a castellated nutheld in ad- 4justed position by means of a cotter pin 23 i extending through an elongated yslot kin the valve stem. 1

. The main`valve 15,'consisting by` preff*y erence of a single casting devoid of packing v or washers, has a port 24 therethrough lwhereby theinlet pressure is communicated to the chamber 11'above the Vvalve 15.* This port 24'comprises, in part, a centrally lo`- cated bore 25 leading downwardly fromthe f upper face of the valve 15.v c

On the lower end ofthe vvalvefstem 22 is a pin v27 alined with thek bore 25 and of ratented Fens, 1921.A

ber above the main valve. This pin has a two-fold function in that it keeps the bore y25 in a clean condition, and restricts theflow of fluid therethrough and thus aids in conf Atrolling thelength ofy flush. Topermit of The object ofthe present invention is to= provide an improved .fiushing valve which is simple in construction, and` efficient and practically noiseless in operation; which is l yPreferably this pin is so adjusted that when the valves 15 and 21 are closed (as shown in the drawings) the lower end of the pin termil nates just short of the bore 25, this being ulated member is held in actuated position.

of advantage in that the port 24 is then unrestricted so that the fullforce ofpressure within ,the inlet opening 12' ymay be communicated to the chamber 11 to maintain the justed yso thatl the lower end ofthe same,

when the valves 15 and 21 are in closed posi-V tlons, will be in the relation to the portc25 just described. v

For the purpose of limiting thelength of 1 flush, means/is provided for preventing the control valve21 from being held in open `p ositionbeyond a predetermined duration of time byholding the manipulating member inoperative position.

The manipulating member ishereinshown as being in the form of a push button 30 mounted for movement in the outer end of va ycylindrical extension 31 on the cap 16 yand normally urged outwardly thereof by a spring 32 resting on a bushing33 fixed in the extension. Pivoted `on the manipulat- Ing member is a pawl 84 having a. notch 35 which receives the edge of a head 36 on the A'outer lend of the stem 22. The lower end of c the pawl 34, which kis of increased width, extends into an undercut groove in lthe bush-V ing and has similarly inclined spaced surfaces 37 and 38 adapted to respectively' cooperate with inclined surfaces-39 and 40-on the-overhanging wall and bottom wall respectively ofthe groove. It will be noted j that the opposed inclined surfaces'3`9and40 kare spaced apart a'greater distance than lare the surfaces 37 and 38 ofthe pawl so that Lwhen the surfaces 38 and 40 comefinto engagement, the pawl. will be swung away los from the head 36 and when the manipulating member moves outwardly of the eXten- AsionY 31 the engagement of the inclined surpressure and retains the main valve 15 and the `control valve 2l in closed positions. Upon depression oi" the push button BO, the control valve, due to the engagement of the shoulder ell of the pawl against the head 36 or the valve stem, will be moved into open position and communication between the chamber 11 and the outlet opening 18 is established through the bypassv 17, 18 and this results in a reduction ol' pressure in the chamber 11'so that the inlet pressure on the bottom of the Vmain valve 15 moves the same away from its seat and direct communication is thereby established between the inlet opening 12 and the outlet opening 13. As the-manipulating member reaches the end ot' its operative stroke, the pawl 34, due to engagement of surfaces 38 and L10, will be swung in a' direction to. vwithdraw the shoulder t1 from the head 36 and thereafter the control valve is free to Vautomatically close, although the manipulating member may be further held in depressed position. After the valve stem is thusY released from the pawl, the control valve, due to suction or the fluid as it passes into the bypass, will be drawn into closed` position, but if this force Y of suction is'not strong enough to accomplish this result, the main valve will engage the valve stein- 22 and positively move the same to seat the control valve. After the control valve is seated7 fluid trom the inlet opening will flow through the port 24g in the main valve and, due to the pressure thus built up in thechamber 11, the main valve is -ltorced to its seat. After the push butto-n isreleased, the spring 32 will move same outwardly, and the surface 37' of the pawl will engagev the inclined surface 39 01"' the bushing so that the p'awl will be thrown into the operative position shown in; the drawing. It will' be readily understood that il a shorter length of flush isdesired, the control valve 21 will be adjusted upwardly on the stem 22, to shorten the distance this valve is moved awayffrom its seat upon depression of the pushbutton, and when a longer iiush is desired, the control valve is adjusteddownwardly on its stem 22.

While. the form of mechanism herein shown and described is admirably adapted to fullil the objects primarily stated, it is tobe understood that it is not intended to confine the invention to the one form of embodiment shown and described herein, as 1tv 1s susceptible of embodiment in various forms, all coming within the scope of the claims which follow.

1 claim as my invention 1. In a iiushing device, a casing having an outlet opening and an inlet opening, a main valve controlling said outlet opening, a pressure chamber behind said main valve, a port in the ina-in valve permitting eommunication between said inlet opening and pressure chamber, a bypass between said pressure chamber` and'outlet opening, a valve stem, a control valve thereon 'controlling said bypass and opening toward said main valve, and a pin on said stem alined with the port of said main valve and terminating adjacent to but short ol said port when said valves are in closed position.

2. In a flushing device, a casing having an outlet open-ingand an inlet opening, a main valve controlling said outlet opening, a pressure chamber behind said valve, a port in said main valve permitting communication between the inlet opening and said chamber, a bypass between said chamber and outlet opening, a valve stem, a. control valve adjustable thereon controlling said bypass and opening toward said main valve, and a pin` adjustably carried by said stem alined with said port of said main valve and terminating adjacent to but short of said port when said valves are closed.

3. 1n a flushing device, a casing having an outlet and an inlet opening, a main valve controlling one ol' said openings, a pressure chamber behind' said main valve, a control valve for controlling the relief of pressure therein, a valve stem carrying said control valve, a manipulating member, a connection Vcarried by said. manipulating member and engaging said stem, and means for moving said connection out or engagement with said stem when the manipulating member approaches the end of its operative stroke.

Il'. In a flushing device, a casing having an inlet and an outlet opening, a main valve controlling one of said openings, a pressure chamber behind the main valve, a control valve' controlling the relief oi' pressure tliereima valve stem carrying said control valve, manipulating member, a connection carried by said manipulating member and engaging said stem, means for moving said connection out of engagementwith said stem when the manipulating member approachesv the end' of its operative stroke,- and' means for moving said connection -into engagementA with said stemv when the manipulating member approaches the end of its inoperative stroke.

5. In a flushing valve, Va casing having an inlet and an outlet opening, a main valve Vcontrolling one of said openings, a pressure valve, a manipulating member, a connection carried by said manipulating member and engaging said stem, means for moving said connection out of engagement With said stem when the manipulating member approaches the end of its operativev stroke, means for moving said connection into engagement with said stem Wh en the manipulating member approaches the end of its inoperative stroke, and means for Vrelatively adjusting said stem and connection t0 vary lthe throw of the control valve upon actuation of the manipulating member and thereby change the length of flush.

6. In a flushing device, a casing having an inlet opening and an outlet opening, a main valve controlling one of said openings, a y

pressure chamber behind the main valve, a control valve for relieving pressure therein, a stem carrying said control valve, a manipulating member, a paWl pivotally carried thereby and engaging said stem, opposed vthe manipulating member approaches the end of its inoperative stroke.

i MrcHAEL H. FLYNN.

'similarl inclinedcam surfaces on the casmg, an a pair of inclined surfaces on said, 

